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1. 发明授权

US4824874A Polyimide foam precursor and its use in reinforcing open-cell materials 失效
标题翻译：聚酰亚胺泡沫前体及其在增强开孔材料中的应用
公开(公告)号：US4824874A
公开(公告)日：1989-04-25
申请号：US905718
申请日：1986-09-09
申请人： Kyu W. Lee
发明人： Kyu W. Lee
IPC分类号： C08G18/34 , C08G18/67 , C08G18/81 , C08J9/02 , C08J9/00
CPC分类号： C08J9/02 , C08G18/346 , C08G18/674 , C08G18/6765 , C08G18/8183 , B29K2079/00 , C08J2379/08
摘要： Open-cell structures are filled with polyimide foam formed in place by the use of a foam precursor in powdered form comprised of a combination of (a) the reaction product of an excess of organic polyisocyanate and a member selected from the group consisting of furfuryl alcohol and condensation products thereof, and (b) an organic polycarboxylic compound containing two carboxylic anhydride groups. The precursor is prepared by combining the species under conditions which favor the reaction of the furfuryl alcohol with the polyisocyanate, but not the polyimide-forming reaction. The polyimide-forming reaction itself is then performed by adding preselected amounts of the powdered precursor, depending on the desired ultimate density of the foam, to each cell of the open-cell structure, then heating to initiate the polyimide reaction, and permitting the carbon dioxide generated by the reaction to escape while confining the resulting foam to the cells.
摘要翻译：开孔结构填充有聚酰亚胺泡沫，通过使用粉末形式的泡沫前体填充形成的聚酰亚胺泡沫，粉末形式由以下组合组成：（a）过量有机多异氰酸酯的反应产物和选自糠醇及其缩合产物，和（b）含有两个羧酸酐基团的有机多元羧酸化合物。通过在有利于糠醇与多异氰酸酯的反应的条件下组合物种制备前体，而不是聚酰亚胺形成反应。然后通过将预定量的粉末前体（取决于泡沫的期望的最终密度）加入到开孔结构的每个电池中，然后加热以引发聚酰亚胺反应，并允许碳通过反应产生的二氧化碳逸出，同时将所得泡沫限制在细胞中。

2. 发明授权

US4739023A Polymerization of vinyl chloride with a clay and a hydrophilic polymer suspending agent 失效
标题翻译：用粘土和亲水性聚合物悬浮剂聚合氯乙烯
公开(公告)号：US4739023A
公开(公告)日：1988-04-19
申请号：US914412
申请日：1986-10-02
申请人： Kyu W. Lee , Sam K. Lim
发明人： Kyu W. Lee , Sam K. Lim
IPC分类号： C08F2/18 , C08F2/20 , C08F4/34 , C08F14/00 , C08F14/06
CPC分类号： C08F14/06
摘要： There is disclosed a suspension polymerization of vinyl chloride in which the suspension of monomers as droplets is maintained, and the droplets of polymer are prevented from coalescence by the addition of an expanding lattice clay, preferably a magnesium alumina silicate clay, most preferably, Veegum, and a hydrophilic polymer. The hydrophilic polymer can be a partially hydrolized polyvinyl alcohol, a hydroxyalkyl cellulose ether, or a cross-linked polyacrylic acid, the latter being preferred. These addities enhance polymerization by reducing polymerization time and reducing deposition of the polymer in the reactor. Additionally, the shape and particle size distribution of the polymer is improved.
摘要翻译：公开了氯乙烯的悬浮聚合，其中保持了作为液滴的单体的悬浮液，并且通过添加膨胀的格子状粘土，优选硅酸铝硅酸盐粘土，最优选Veegum，防止聚合物的液滴聚结，和亲水性聚合物。亲水性聚合物可以是部分水解的聚乙烯醇，羟烷基纤维素醚或交联聚丙烯酸，后者是优选的。这些添加剂通过减少聚合时间和减少聚合物在反应器中的沉积来增强聚合。此外，改善了聚合物的形状和粒度分布。

3. 发明授权

US5157157A Process for preparing 1-oxo-1,2,3,4,-tetrahydronaphthalene 失效
标题翻译： 1-氧代-1,2,3,4-四氢萘的制备方法
公开(公告)号：US5157157A
公开(公告)日：1992-10-20
申请号：US710837
申请日：1991-06-04
申请人： Myoung J. Choi , Kyu W. Lee
发明人： Myoung J. Choi , Kyu W. Lee
IPC分类号： B01J23/26 , C07B61/00 , C07C45/36 , C07C49/67
CPC分类号： B01J23/26 , C07C45/36
摘要： This invention relates to a process for preparing 1-oxo-1,2,3,4-tetrahydronaphtahalene(.alpha.-tetralone) in high yield and high selectivity from the liquid phase oxidation of tetralin in a bubble column reactor under several homogeneous and heterogeneous catalyst systems such as hexavalent chromium oxide, silica-supported chromium oxide,and insoluble material from the homogeneous oxidation mixture in N,N-dialkyl acid amides.
摘要翻译：本发明涉及以几种均相和多相催化剂在泡罩塔反应器中从四氢萘的液相氧化以高产率和高选择性制备1-氧代-1,2,3,4-四氢萘并噻ene（α-四氢萘酮）的方法诸如六价铬氧化物，二氧化硅负载的氧化铬的系统和来自N，N-二烷基酸酰胺中的均相氧化混合物的不溶性物质。

4. 发明授权

US4806573A Polyimide foam precursor and its use in reinforcing open-cell materials 失效
公开(公告)号：US4806573A
公开(公告)日：1989-02-21
申请号：US209760
申请日：1988-06-22
申请人： Kyu W. Lee
发明人： Kyu W. Lee
IPC分类号： C08G18/34 , C08G18/67 , C08G18/81 , C08J9/02 , C08J9/00
CPC分类号： C08J9/02 , C08G18/346 , C08G18/674 , C08G18/6765 , C08G18/8183 , B29K2079/00 , C08J2379/08
摘要： Open-cell structures are filled with polyimide foam formed in place by the use of a foam precursor in powdered form comprised of a combination of (a) the reaction product of an excess of organic polyisocyanate and a member selected from the group consisting of furfuryl alcohol and condensation products thereof, and (b) an organic polycarboxylic compound containing two carboxylic anhydride groups. The precursor is prepared by combining the species under conditions which favor the reaction of the furfuryl alcohol with the polyisocyanate, but not the polyimide-forming reaction. The polyimide-forming reaction itself is then performed by adding preselected amounts of the powdered precursor, depending on the desired ultimate density of the foam, to each cell of the open-cell structure, then heating to initiate the polyimide reaction, and permitting the carbon dioxide generated by the reaction to escape while confining the resulting foam to the cells.

5. 发明授权

US4939019A Compositions and process for producing foam plastics 失效
标题翻译：用于生产泡沫塑料的组合物和方法
公开(公告)号：US4939019A
公开(公告)日：1990-07-03
申请号：US436834
申请日：1989-11-15
申请人： Ching-Chi Kuo , Mark Robertson , Kyu W. Lee
发明人： Ching-Chi Kuo , Mark Robertson , Kyu W. Lee
IPC分类号： C08J9/02 , C08J9/06
CPC分类号： C08J9/02 , C08J9/06 , C08J2333/02 , Y10T428/249981 , Y10T428/249987 , Y10T428/24999 , Y10T428/249991
摘要： Plastic foam materials having a high degree of structural integrity, cell network uniformity and small cell size are obtained from (meth)acrylic acid and (meth)acrylonitrile by incorporating acrylamide as a comonomer additive within certain ranges of concentration. Incorporation of the latter together with conventional additives normally used in preparing foams from the principal monomers helps to avoid preliminary precipitation during the polymerization process, and the gradients in the polymer microstructure which frequently result and cause internal stresses and weaknesses in the ultimate product.
摘要翻译：通过在一定浓度范围内加入作为共聚单体添加剂的丙烯酰胺，由（甲基）丙烯酸和（甲基）丙烯腈获得具有高度结构完整性，细胞网络均匀性和小孔尺寸的塑料泡沫材料。将后者与通常用于制备主要单体泡沫的常规添加剂一起有助于避免在聚合过程中的初步沉淀，以及聚合物微结构中的梯度，其经常导致并导致最终产物的内部应力和弱点。

6. 发明授权

US4918110A Compositions and process for producing foam plastics 失效
公开(公告)号：US4918110A
公开(公告)日：1990-04-17
申请号：US243383
申请日：1988-09-12
申请人： Ching-Chi Kuo , Mark Robertson , Kyu W. Lee
发明人： Ching-Chi Kuo , Mark Robertson , Kyu W. Lee
IPC分类号： C08J9/02 , C08J9/06
CPC分类号： C08J9/02 , C08J9/06 , C08J2333/02
摘要： Plastic foam materials having a high degree of structural integrity, cell network uniformity and small cell size are obtained from (meth)acrylic acid and (meth)acrylonitrile by incorporating acrylamide as a comonomer additive within certain ranges of concentration. Incorporation of the latter together with conventional additives normally used in preparing foams from the principal monomers helps to avoid preliminary precipitation during the polymerization process, and the gradients in the polymer microstructure which frequently result and cause internal stresses and weaknesses in the ultimate product.

7. 发明授权

US4830883A Polyimide foam precursor and its use in reinforcing open-cell materials 失效
公开(公告)号：US4830883A
公开(公告)日：1989-05-16
申请号：US209757
申请日：1988-06-22
申请人： Kyu W. Lee
发明人： Kyu W. Lee
IPC分类号： C08G18/34 , C08G18/67 , C08G18/81 , C08J9/02
CPC分类号： C08J9/02 , C08G18/346 , C08G18/674 , C08G18/6765 , C08G18/8183 , B29K2079/00 , C08J2379/08
摘要： Open-cell structures are filled with polyimide foam formed in place by the use of a foam precursor in powdered form comprised of a combination of (a) the reaction product of an excess of organic polyisocyanate and a member selected from the group consisting of furfuryl alcohol and condensation products thereof, and (b) an organic polycarboxylic compound containing two carboxylic anhydride groups. The precursor is prepared by combining the species under conditions which favor the reaction of the furfuryl alcohol with the polyisocyanate, but not the polyimide-forming reaction. The polyimide-forming reaction itself is then performed by adding preselected amounts of the powdered precursor, depending on the desired ultimate density of the foam, to each cell of the open-cell structure, then heating to initiate the polyimide reaction, and permitting the carbon dioxide generated by the reaction to escape while confining the resulting foam to the cells.

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